That horrible horrible moment when you want to find a particular piece of fanart but you saw it scrolling tumblr anywhere from a week to a month ago, and it was only available as the reblog of a different post, and you didn't like or reblog it at the time and don't know who to search for to find it...
It was somebody trying to count how many of the doctors wore checkered pants. And somebody drew a picture of all of those doctors in a line. And then OP realized they'd forgotten 5, so the artist did an edit that added 5 chasing behind the group. It was perfect, and I want it back :(